EP3992528B1 - Procédé de commande d'une alimentation en eau dans une chaudière - Google Patents

Procédé de commande d'une alimentation en eau dans une chaudière Download PDF

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Publication number
EP3992528B1
EP3992528B1 EP20205158.7A EP20205158A EP3992528B1 EP 3992528 B1 EP3992528 B1 EP 3992528B1 EP 20205158 A EP20205158 A EP 20205158A EP 3992528 B1 EP3992528 B1 EP 3992528B1
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EP
European Patent Office
Prior art keywords
boiler
feed water
steam
liquid level
supply
Prior art date
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Active
Application number
EP20205158.7A
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German (de)
English (en)
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EP3992528C0 (fr
EP3992528A1 (fr
Inventor
Tom NØRGAARD JENSEN
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Alfa Laval Corporate AB
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Alfa Laval Corporate AB
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Priority to PL20205158.7T priority Critical patent/PL3992528T3/pl
Application filed by Alfa Laval Corporate AB filed Critical Alfa Laval Corporate AB
Priority to EP20205158.7A priority patent/EP3992528B1/fr
Priority to KR1020237018193A priority patent/KR20230097130A/ko
Priority to JP2023526634A priority patent/JP2023550290A/ja
Priority to CN202180073735.5A priority patent/CN116529529A/zh
Priority to PCT/EP2021/080150 priority patent/WO2022090480A1/fr
Publication of EP3992528A1 publication Critical patent/EP3992528A1/fr
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Publication of EP3992528C0 publication Critical patent/EP3992528C0/fr
Publication of EP3992528B1 publication Critical patent/EP3992528B1/fr
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D5/00—Controlling water feed or water level; Automatic water feeding or water-level regulators
    • F22D5/26—Automatic feed-control systems
    • F22D5/30—Automatic feed-control systems responsive to both water level and amount of steam withdrawn or steam pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D11/00—Feed-water supply not provided for in other main groups
    • F22D11/02—Arrangements of feed-water pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D5/00—Controlling water feed or water level; Automatic water feeding or water-level regulators
    • F22D5/26—Automatic feed-control systems
    • F22D5/34—Applications of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D7/00—Auxiliary devices for promoting water circulation
    • F22D7/12—Control devices

Definitions

  • the present invention relates to a method of controlling a supply of feed water into a boiler, a system for controlling a supply of feed water into a boiler, a computer program and a computer-readable medium.
  • the present invention concerns a strategy for controlling the water level in a boiler subject to the shrink and swell phenomena. These phenomena can occur when there is a change in the steam load on the boiler (the main disturbance in the system). Such a change in steam load will affect the steam pressure in the boiler which in turn affects the volume of steam suspended in the boiler water. This leads to a so-called inverse response of the water level (non-minimum phase behaviour) where the initial response of the level is opposite to the long-term behaviour.
  • a water level control strategy is designed to accommodate an adverse effect of the water levels inverse response to the disturbance.
  • Boiler drum level control systems are known in the prior art.
  • US 9476584 describes a boiler drum level control system using the position of a bypass valve configured to control the steam flow.
  • the controller commands the feed-water flow and heat input to the evaporator based on sensor signals.
  • the sensor signals are generated by sensors that measure fluid flow, steam flow, drum pressure, drum temperature, and bypass position.
  • the drum pressure may be measured directly by detecting the position of the by-pass valve providing leading indicators of a pressure change in the boiler which may result in an adjustment of the water level in the drum.
  • JP 2504939 describes a boiler level control device controlling the opening degree of a bypass valve for branching surplus steam to the condenser thereby bypassing the steam turbine.
  • Pressure sensors are used for determining the steam flow.
  • US 10185332 describes a boiler drum level control method using the difference between a steam flow signal and a feed water flow signal.
  • a transient controller calculates the gain parameter based on the absolute flow difference. Additional parameters include a bypass valve position.
  • CN 109028023 describes how a change of the steam load of a marine boiler is controlled by sending signals to a PLC regulating the feed water valve. The water level and the steam flow are measured. The steam flow rate is introduced as a feed forward control signal. When the steam load suddenly changes, the steam flow rate signal causes the feed water regulating valve to initially move in the correct direction, i.e. when steam flow is increased, the feed water regulating valve is opened. A vortex flow meter is used for monitoring the load.
  • US 7931041 describes a method for controlling a liquid level in a boiler using filtered output signals representing liquid level, gas/steam flow rate, feed-liquid flow rate, vessel pressure and vessel temperature.
  • US 10323547 describes a steam level control system of a boiler measuring the position of a bypass valve bypassing a heat recovery steam generator.
  • JP 2018080672 describes a steam turbine control device having a steam control valve opening degree detector. It does not relate to the supply of feed water into the boiler.
  • the above object is realized in a first aspect of the present invention by a method of controlling a supply of feed water into a boiler, as described in claim 1, the boiler comprising a feed water inlet for supplying feed water into the boiler, a steam outlet for taking steam from the boiler and a liquid level sensor for measuring a liquid level in the boiler, the steam outlet comprising a steam valve defining a steam valve opening degree, the method comprising:
  • the boiler includes a vessel for accommodating water and steam.
  • the water is supplied to the boiler via the feed water inlet.
  • the stream is generated by heat input into the vessel.
  • the steam is taken out of the boiler via the steam outlet.
  • the steam outlet is controlled by a steam valve defining a steam valve opening degree.
  • the steam generated may be used for operating a steam turbine or other types of steam consumers.
  • the boiler also including the liquid level sensor.
  • the liquid level sensor measures the liquid level in the boiler. Below the liquid level the vessel comprises a two-phase flow comprising liquid water and steam bubbles and above the liquid level the vessel essentially comprises steam.
  • the liquid level in the boiler is normally controlled by adjusting the supply of feed water into the boiler by means of a feed pump and/or valve in response to the measured liquid level in the boiler using a control scheme.
  • a feed pump and/or valve in response to the measured liquid level in the boiler using a control scheme.
  • the boiler pressure will drop. This leads to steam bubbles suspended in the liquid water being released, whereby the liquid level will initially swell.
  • the liquid level in the boiler rises initially and then drops as more steam is taken out of the boiler.
  • a naive controller e.g. simple PID which does not take the swell phenomenon into consideration
  • the response to the initial increased liquid level in the boiler will be that the water feed into the boiler is decreased, which will subsequently lead to too low liquid level of water in the boiler as more steam is taken out of the boiler. This may potentially lead to a damage of the boiler due to low liquid level.
  • the initial response should be to increase the water feed to counter the increased taking out of steam from the boiler.
  • the signal representing the opening degree of the steam valve and the signal representing the liquid level in the boiler is used to determine the supply of feed water into the boiler.
  • the reference liquid level for the boiler is a constant which represents the normal liquid level under steady state conditions and is determined by the design of the boiler.
  • From the signal representing the opening degree of the steam valve a rate of change of the steam valve opening degree is determined and used to compensate the inverse response to the disturbance, i.e. the drop of the liquid level when the steam load increases.
  • the rate of change of the steam valve opening degree is zero when the steam valve opening degree is constant, i.e. when the steam valve is still and the steam load is constant.
  • the rate of change of the steam valve opening degree is non-zero.
  • the feed water inlet comprises a feed water valve defining a feed water valve opening degree
  • the method comprises determining the supply of feed water into the boiler by the feed water valve opening degree
  • a feed water valve In order to control the supply of feed water to the boiler, a feed water valve can be used.
  • the opening degree of the feed water valve is available as the actuation signal for the boiler water level controller.
  • the feed water inlet is connected to a pump, the pump defining a flow rate, the supply of feed water into the boiler is determined by the flow rate.
  • the feed water valve in the feed water line can be omitted.
  • the flow rate is based on the rotational speed of a pump.
  • the rotational speed of a pump may be changed
  • the controlling of the supply of feed water into the boiler is performed using a PI control scheme.
  • the control action is designed to minimize the adverse effect of a change in the disturbance.
  • the PI (Proportional-Integral) controller performs the calculations for a proportional-integral algorithm based on an integral parameter and a proportional or gain parameter and the generated output is a flow control signal used to control the supply of feed water to the boiler.
  • controlling the supply of feed water into the boiler including: generating a feed water control action based on the difference between the liquid level in the boiler and the reference liquid level for the boiler, and, determining the supply of feed water into the boiler based on the sum of the feed water control action and the rate of change of the steam valve opening degree.
  • the rate of change of the steam valve opening degree signal can be added to the control action in a feed-forward manner, i.e. after the controller, on basis of which the opening degree of the feed valve (or alternatively the flow/speed of the feed pump) is controlled.
  • the corrective term to the feed water control action is introduced immediately when the disturbance occurs without having to wait for the water level to drop before the controller takes corrective action.
  • the controller typically use a linear siso control scheme to generate the control action.
  • the controller is preferably a PI controller and the control action is preferably a PI control action.
  • controlling the supply of feed water into the boiler including: generating a feed water control action based on the sum of the rate of change of the steam valve opening degree and the difference between the liquid level in the boiler and the reference liquid level for the boiler, and, determining the supply of feed water into the boiler by the feed water control action.
  • the rate of change of the steam valve opening degree signal can alternatively be added in a feed-back manner, i.e. added to the measured liquid level before the controller, on basis of which the opening degree of the feed valve (or alternatively the speed of the feed pump) is controlled. In this way the corrective term to the feed water control input is introduced into the controller which takes corrective action.
  • the controller typically use a linear siso control scheme to generate the control action.
  • the controller is preferably a PI controller and the control action is preferably a PI control action.
  • the method comprises determining the rate of change of the steam valve opening degree by using a phase-lead filter on the steam valve opening degree.
  • the opening degree of the water feed is controlled by disturbance compensation in the water level control provided by a lead filter.
  • the lead filter provides a zero output in case of constant inputs to the filter, but a non-zero output, when the input changes, i.e. when the steam load suddenly changes.
  • the filtered rate of change of the steam valve opening degree replaces the rate of change of the steam valve opening degree in the above feed-forward and feed-back schemes.
  • the method further comprising the steps of:
  • the heat input into the boiler may be controlled by a second controller.
  • the heat input based on the pressure measurement and a reference pressure for the boiler.
  • the pressure measurement is made by a pressure sensor in the vessel. The pressure thus represents the total energy in the boiler.
  • the reference pressure for the boiler is a constant which represents the normal operating pressure under steady state conditions and is determined by the design of the boiler.
  • controlling a heat input into the boiler including: generating a heat input control action based on the difference between the pressure in the boiler and a reference pressure for the boiler, and, determining the heat input into the boiler by the heat input control action.
  • the heat input into the liquid in the vessel is based on the control action. A higher heat input will cause more steam to be generated resulting in a higher pressure and vice versa. According to a further embodiment, the controlling of the heat input into the boiler is performed using a PI control scheme.
  • the control action is designed to minimize the adverse effect of a change in the disturbance.
  • the PI (Proportional-Integral) controller performs the calculations for a proportional-integral algorithm based on an integral parameter and a proportional or gain parameter and the generated output is a flow control signal.
  • a boiler according to claim 12 having a control system for controlling a supply of feed water into a boiler, the boiler comprising a feed water inlet for supplying feed water into the boiler, a steam outlet for taking steam from the boiler and a liquid level sensor for measuring a liquid level in the boiler, the steam outlet comprising a steam valve defining a steam valve opening degree, the control system controlling the supply of feed water into the boiler via the feed water inlet based on the liquid level in the boiler, a reference liquid level for the boiler and a rate of change of the steam valve opening degree.
  • the above boiler according to the second aspect may comprise any of the features of the method according to the first aspect.
  • the above object is realized in a third aspect of the present invention by a computer program comprising instructions which, when the program is executed by a computer, cause the computer to carry out the method according to the first aspect.
  • control solution including the feed-back disturbance compensation according to the previous aspects can preferably be implemented as software in a programmable logic controller (PLC).
  • PLC programmable logic controller
  • FIG. 1 is a simplified schematic view of a boiler 10.
  • the boiler 10 comprises a vessel 12.
  • the vessel defines a liquid level illustrated by a corrugated line.
  • the liquid level is measured by a liquid level sensor 14.
  • the boiler 10 further comprises a feed water inlet 20 for supplying feed water into the vessel 12 and a steam outlet 22 for taking out steam from the vessel 12.
  • the feed water inlet 20 is supplied via a pump 24' and controlled by a feed water inlet valve 24 and the steam outlet is controlled by a steam outlet valve 26.
  • the boiler 10 further comprises a riser 28 and a downcomer 30 forming a closed loop together with the vessel 12. Heat is supplied to the riser causing boiling. The steam rises to the vessel and causes a circulation in the riser 28 - vessel 12 - downcomer 30 loop. In the present schematic view only one riser and one downcomer are presented, however, in practice many risers and downcomers are used.
  • the boiler 10 further comprising a pressure sensor 32 for measuring the pressure in the vessel 12.
  • FIG. 2 is a block diagram illustrating the feed water level control strategy according to the present invention.
  • the block having the reference numeral 34 is the block representing the plant, i.e. the boiler.
  • the inputs to the block 34 are the supply of feed water q ⁇ and the supply of heat Q while the outputs from the block 34 are the measured liquid level l and the measured pressure p in the vessel.
  • the disturbance is the outflow of steam q s however, according to the present invention, the outflow of steam q s is not directly measured.
  • the outflow of steam q s from the boiler is controlled by the steam valve having the reference numeral 36, and the measurable disturbance is then the opening degree OD st of the steam valve 36.
  • the supply of feed water q ⁇ is controlled by the feed water valve/pump 38 which has the opening degree OD fw of the feed water valve 38 as input, and optionally the pressure p in the boiler and the rotational speed of the pump ⁇ .
  • the boiler pressure p can affect the feedwater flow into the boiler since it is the pressure on the secondary side of the feedwater valve/pump
  • the control action should be designed to minimize the adverse effect of a change in the disturbance, i.e. the change of steam load, on the water level in the boiler.
  • the control system is fitted with two independent PI controllers: one controls the heat input based on the pressure measurement and the other controls the feed water input based on the water level measurement.
  • the main strategy to improve the closed loop system response to changes in the steam load is to detect the (rising/falling) edge of the disturbance using a filter which has zero output for constant inputs and gives a non-zero output whenever the input signal to the filter changes value.
  • the opening degree OD st of the steam valve is fed to a lead filter 44 which generates a filter output y ll .
  • These parts are marked in dashed blocks and wires.
  • the path leading to the block having reference numeral 46 is the feed-forward strategy L ff while the path leading to the block having reference numeral 48 is the feed-back strategy L fb .
  • FIG. 3 shows the step response of the phase-lead filter.
  • the term k ⁇ v is not well defined for piecewise constant k v .
  • b 1 (0.1) T s / T .
  • two strategies are described to use the output of the filter to compensate for the disturbance.
  • the first strategy to improve the response of the level control is to add the output of the filter of [eq. 5] in a feed-forward manner to the control signal from the PI control.
  • the intention is to add a corrective term to the feed water control input immediately when the disturbance occurs without having to wait for the water level to drop before the PI controller takes corrective action.
  • the gain L ff should be in the region where L ff y II is in the same order of magnitude as the output of the PI controller.
  • the second strategy to improve the response of the level control is to add the output of the filter of [eq. 5] to the level measurement in a feed-back manner.
  • the intention is to compensate directly in the water level measurement the immediate increase (decrease) of the water level in which the increased (decreased) steam load results.
  • Simulations have been made to validate the control scheme.
  • the simulation model used for the simulations has been described in the publication by K. J. ⁇ ström and R. D. Bell.
  • the boiler used in the simulation model is principally shown in FIG. 1 .
  • the system model derived in the publication by K. J. ⁇ ström and R. D. Bell is a non-linear state-space model with four state variables. These state variables are: the drum pressure p; the total volume of water V wt in the drum, risers and down-comers; the steam quality (i.e. the mass fraction of steam) ⁇ r at the riser outlet; the volume of steam V sd under the water level in the drum.
  • Exogenous inputs to the system are: the feed water mass flow q ⁇ into the boiler; the heat input Q to the riser; the steam mass flow q s out of the boiler, see FIG. 1 .
  • FIG. 4 - FIG. 6 show the results of the simulation of the more ideal case where the feed water flow is directly available for actuation and the steam valve resistance is the measurable disturbance.
  • a step is added to the disturbance (here the valve resistance parameter) and the closed loop system response is observed.
  • FIG. 4 shows the simulation results when the boiler water level is controlled using the standard/baseline proportional-integral control action in [eq. 1].
  • Four plots of different time series are given.
  • the upper left plot shows the boiler water level l relative to some desired reference.
  • the upper right plot shows the control signal q ⁇ or the feed water input.
  • the lower left plot shows the boiler pressure p.
  • the lower right plot shows the control signal Q for the heat input.
  • the setup here is that the feed water control should hold the relative boiler water level at a reference of 0 m while the heat control should hold the boiler pressure at a reference value of 8 MPa.
  • FIG. 5 shows the simulation results when the feed-forward action described by [eq. 7] is added to the boiler water level control.
  • the layout in the figure is the same as in FIG. 4 .
  • the initial response of the feed water control to the disturbance has now been changed such that an increased steam demand now leads to an increase in feed water despite of the initial inverse response of the water level.
  • FIG. 6 shows the simulation results when the disturbance feed-back action described by [eq. 9] is added to the boiler water level control. Again, the layout is the same as in FIG. 4 and FIG. 5 .
  • the initial response of the control is to increase the feedwater input despite the initial increase in the water level due to swelling.
  • the subsequent dip in the boiler water level has been decreased with approximately 90 % to -0.8 cm.
  • FIG. 7 - FIG. 10 show the results of the simulation of the more realistic second case mentioned above.
  • the PI controller used to control the boiler water level had access to measurements of the steam flow valve resistance and that the controller could actuate the feed water flow directly.
  • Such actuation could potentially be realized using an inner loop flow controller.
  • such an inner loop controller would be dependent on a measurement of the feed water flow.
  • the setup is the one illustrated in FIG. 1 Here the equipment which feeds water to the boiler as well as the valve which determines the steam flow are shown. It will be assumed: 1) that the opening degree of the steam valve OD st is known and can be used as input to the boiler water level controller, 2) that the feed water pump operates at a constant speed and 3) that the opening degree of the feed water valve OD fw is available as the actuation signal for the boiler water level controller.
  • FIG. 7 shows the simulation results obtained using the baseline boiler water level controller defined in the controller equation [eq. 11].
  • FIG. 8 shows the simulation results obtained using the feed-forward disturbance compensation as defined in the controller equation [eq. 14].
  • FIG. 10 shows the results of a simulation of the above control solution including the feed-back disturbance compensation implemented in PLC (Programmable Logic Controller) software.
  • PLC Programmable Logic Controller
  • the implementation has been tested in closed loop using the "PLCSim" software by Siemens to emulate the PLC.
  • the results shown in FIG. 10 may be compared to the results shown in FIG. 9 to verify the correctness of the PLC implementation.
  • the results are the same except for some quantization noise due to rounding errors arising from the finite representation of the control outputs in the PLC. This quantization is indicated in the zoomed areas in FIG. 10 .

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)
  • Feedback Control In General (AREA)

Claims (14)

  1. Procédé de commande d'une alimentation en eau d'alimentation dans une chaudière (10), la chaudière (10) comprenant une entrée d'eau d'alimentation (20) pour alimenter de l'eau d'alimentation dans la chaudière (10), une sortie de vapeur (22) pour prélever de la vapeur à partir de la chaudière (10) et un capteur de niveau de liquide (14) pour mesurer un niveau de liquide dans la chaudière (10), la sortie de vapeur (22) comprenant une soupape de vapeur (26) définissant un degré d'ouverture de soupape de vapeur (26), le procédé comprenant :
    la mesure du niveau de liquide dans la chaudière (10) au moyen du capteur de niveau de liquide (14),
    la détermination d'une cadence de changement du degré d'ouverture de soupape de vapeur (26), et
    la commande de l'alimentation d'eau d'alimentation dans la chaudière (10) via l'entrée d'eau d'alimentation (20) en fonction du niveau de liquide dans la chaudière (10) et d'un niveau de liquide de référence pour la chaudière (10), caractérisé en ce que la commande d'alimentation d'eau d'alimentation dans la chaudière est en outre fonction de la cadence de changement du degré d'ouverture de la soupape de vapeur (26).
  2. Procédé selon la revendication 1, dans lequel l'entrée d'eau d'alimentation (20) comprend une soupape d'alimentation d'eau (24) définissant un degré d'ouverture de soupape d'alimentation d'eau (24), dans lequel le procédé comprend la détermination de l'alimentation d'eau d'alimentation dans la chaudière (10) par le degré d'ouverture de la soupape d'alimentation d'eau (24).
  3. Procédé selon l'une quelconque des revendications précédentes, dans lequel l'entrée d'eau d'alimentation (20) est raccordée à une pompe (24'), la pompe (24') définissant un débit, dans lequel le procédé comprend la détermination de l'alimentation d'eau d'alimentation dans la chaudière (10) par le débit.
  4. Procédé selon la revendication 3, dans lequel le débit est basé sur la vitesse de rotation de la pompe (24').
  5. Procédé selon l'une quelconque des revendications précédentes, dans lequel la commande d'alimentation d'eau d'alimentation dans la chaudière (10) est exécutée au moyen d'un système de régulation PI (40).
  6. Procédé selon l'une quelconque des revendications précédentes, dans lequel la commande d'alimentation d'eau d'alimentation dans la chaudière (10) inclut : la génération d'une action de commande d'alimentation d'eau sur la base de la différence entre le niveau de liquide dans la chaudière (10) et le niveau de liquide de référence pour la chaudière (10), et la détermination de l'alimentation d'eau d'alimentation dans la chaudière (10) sur la base de la somme de l'action de commande d'alimentation d'eau et de la cadence de changement du degré d'ouverture de la soupape de vapeur (26).
  7. Procédé selon l'une quelconque des revendications 1 à 5, dans lequel la commande d'alimentation d'eau d'alimentation dans la chaudière (10) inclut : la génération d'une action de commande d'alimentation d'eau sur la base de la somme de la cadence de changement de degré d'ouverture de la soupape de vapeur (26) et de la différence entre le niveau de liquide dans la chaudière (10) et le niveau de liquide de référence pour la chaudière (10), et la détermination de l'alimentation d'eau d'alimentation dans la chaudière (10) par l'action de commande d'alimentation d'eau.
  8. Procédé selon l'une quelconque des revendications précédentes, dans lequel le procédé comprend la détermination de la cadence de changement du degré d'ouverture de la soupape de vapeur (26) en utilisant un filtre à déphasage en avant (44) sur le degré d'ouverture de soupape de vapeur (26).
  9. Procédé selon l'une quelconque des revendications précédentes, comprenant en outre les étapes suivantes :
    mesure d'une pression dans la chaudière (10) au moyen d'un capteur de pression (32), et
    commande d'un apport de chaleur dans la chaudière (10) sur la base de la pression dans la chaudière (10) et d'une pression de référence pour la chaudière (10).
  10. Procédé selon la revendication 9, dans lequel la commande d'un apport de chaleur dans la chaudière (10) inclut : la génération d'une action de commande d'apport de chaleur sur la base de la différence entre la pression dans la chaudière (10) et d'une pression de référence pour la chaudière (10) et la détermination de l'apport de chaleur dans la chaudière (10) par l'action de commande d'apport de chaleur.
  11. Procédé selon l'une quelconque des revendications 9 à 10, dans lequel la commande de l'apport de chaleur dans la chaudière (10) est exécutée en utilisant un système de régulation PI (42).
  12. Chaudière (10) comportant un système de commande pour commander une alimentation d'eau d'alimentation dans une chaudière (10), la chaudière (10) comprenant une entrée d'eau d'alimentation (20) pour alimenter de l'eau dans la chaudière (10), une sortie de vapeur (22) pour prélever de la vapeur à partir de la chaudière (10) et un capteur de niveau de liquide (14) pour mesurer un niveau de liquide dans la chaudière (10), la sortie de vapeur (22) comprenant une soupape de vapeur (26) définissant un degré d'ouverture de soupape de vapeur (26), le système de commande étant configuré pour commander l'alimentation d'eau d'alimentation dans la chaudière (10) via l'entrée d'eau d'alimentation (20) en fonction du niveau de liquide dans la chaudière (10) et d'un niveau de liquide de référence pour la chaudière (10), caractérisée en ce que le système de commande est configuré en outre pour commander l'alimentation d'eau d'alimentation dans la chaudière en fonction d'une cadence de changement du degré d'ouverture de la soupape de vapeur (26).
  13. Programme informatique comprenant des instructions qui, lorsque le programme est exécuté par un ordinateur, amènent l'ordinateur à exécuter le procédé selon l'une quelconque des revendications 1 à 11.
  14. Support lisible par ordinateur ayant le programme informatique selon la revendication 13 stocké en son sein.
EP20205158.7A 2020-11-02 2020-11-02 Procédé de commande d'une alimentation en eau dans une chaudière Active EP3992528B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP20205158.7A EP3992528B1 (fr) 2020-11-02 2020-11-02 Procédé de commande d'une alimentation en eau dans une chaudière
PL20205158.7T PL3992528T3 (pl) 2020-11-02 2020-11-02 Metoda sterowania dopływem wody zasilającej do kotła
JP2023526634A JP2023550290A (ja) 2020-11-02 2021-10-29 ボイラへの給水の供給を制御する方法
CN202180073735.5A CN116529529A (zh) 2020-11-02 2021-10-29 控制给水到锅炉中的供应的方法
KR1020237018193A KR20230097130A (ko) 2020-11-02 2021-10-29 보일러로의 급수의 공급을 제어하는 방법
PCT/EP2021/080150 WO2022090480A1 (fr) 2020-11-02 2021-10-29 Procédé de commande d'une alimentation en eau d'alimentation dans une chaudière

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EP20205158.7A EP3992528B1 (fr) 2020-11-02 2020-11-02 Procédé de commande d'une alimentation en eau dans une chaudière

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JP (1) JP2023550290A (fr)
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JP2504939B2 (ja) 1984-05-17 1996-06-05 キヤノン株式会社 撮像装置
US7931041B2 (en) 2007-12-19 2011-04-26 General Electric Company System and method for controlling liquid level in a vessel
US20120109581A1 (en) * 2010-10-28 2012-05-03 Ormat Technologies Inc. Diagnostic system and method for an essential turbine valve
US9476584B2 (en) * 2013-12-12 2016-10-25 General Electric Company Controlling boiler drum level
US10323547B2 (en) 2016-02-23 2019-06-18 General Electric Company Steam drum level control system, computer program product and related methods
US10338576B2 (en) * 2016-05-17 2019-07-02 General Electric Company Intelligent management system for balance of plant
US10185332B2 (en) 2016-05-26 2019-01-22 General Electric Company System and method for drum level control with transient compensation
JP6732640B2 (ja) 2016-11-18 2020-07-29 株式会社東芝 タービン制御装置
CN109028023A (zh) 2018-07-09 2018-12-18 武汉理工大学 一种基于粒子群优化算法的船舶主锅炉水位控制***

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CN116529529A (zh) 2023-08-01
EP3992528C0 (fr) 2023-06-07
JP2023550290A (ja) 2023-12-01
PL3992528T3 (pl) 2023-09-11
WO2022090480A1 (fr) 2022-05-05
EP3992528A1 (fr) 2022-05-04

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